Skip to main content
Super TutorResources
Chapter 12 of 25
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Practice Quiz

Identities

ICSE · Class 8 · Mathematics

Practice quiz for Identities — ICSE Class 8 Mathematics. MCQs and questions with answers to test your preparation.

75 questions28 flashcards5 concepts

Interactive on Super Tutor

Studying Identities? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for practice quiz and more.

Try Super Tutor — Free

1,000+ Class 8 students started this chapter today

Quick Quiz: Identities

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

Simplify (x + 7)(x - 4).

2

Expand (3a - 2b)(3a + 2b) and choose the correct result.

3

Evaluate (200 + 8)^2.

4

Evaluate (10 - 0.3)^2.

75 Questions·
multiple choicetrue falsemultiple correct

Sample Questions

1multiple choice
3 marks

If a + b = 8 and ab = 15, find a^2 + b^2.

Show answer

34

Use (a + b)^2 = a^2 + b^2 + 2ab. Given a + b = 8 and ab = 15. 8^2 = a^2 + b^2 + 2×15 64 = a^2 + b^2 + 30 So, a^2 + b^2 = 64 - 30 = 34.

2multiple choice
3 marks

If a - b = 3 and a^2 + b^2 = 29, find ab.

Show answer

10

Use (a - b)^2 = a^2 + b^2 - 2ab. Given a - b = 3 and a^2 + b^2 = 29. 3^2 = 29 - 2ab 9 = 29 - 2ab 2ab = 20 ab = 10.

3multiple choice
3 marks

If a + b + c = 9 and a^2 + b^2 + c^2 = 29, find ab + bc + ca.

Show answer

26

Use (a + b + c)^2 = a^2 + b^2 + c^2 + 2(ab + bc + ca). Given a + b + c = 9 and a^2 + b^2 + c^2 = 29. 9^2 = 29 + 2(ab + bc + ca) 81 = 29 + 2(ab + bc + ca) 52 = 2(ab + bc + ca) ab + bc + ca = 26.

4multiple choice
3 marks

If a + b = 5 and ab = 6, find a^3 + b^3.

Show answer

35

Use a^3 + b^3 = (a + b)^3 - 3ab(a + b). Given a + b = 5 and ab = 6. So, a^3 + b^3 = 5^3 - 3×6×5 = 125 - 90 = 35.

+71 more questions available

Practice All

Frequently Asked Questions

What are the important topics in Identities for ICSE Class 8 Mathematics?
Identities covers several key topics that are frequently asked in ICSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Identities — ICSE Class 8 Mathematics?
Understand the core concepts first, then work through the 75 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Identities

All 25 chapters — ICSE Class 8 Mathematics Practice Quiz

For serious students

Get the full Identities chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 8 Mathematics.

Try Super Tutor Free
Try the full chapter — Free